Elevator-door-operating mechanism



June 10 1924. 1,497,655

I F. F..BRUSH ELEVATOR DOOR OPERATING MECHANISM Filed April 11 1923Patented June 10, 1924.

UNITED STATES PATENT orrics.

FREDERICK F. BRUSH, 013 LOS ANGELES, CALIFORNIA, ASSIGNOR TO ELEVATOR,SAFETY APPLIANCE COMPANY. A CORPORATION OF CALIFORNIA.

ELEVATOR-I)OCR-OPERATING MECHANISM.

Application filed April 11, 1923. Serial No. 631,380.

3 To all whom it may concern.

Be it known that I, Fnnnnnrcn F. BRUSH, a citizen of the United Statesresiding at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented a new and useful Improvement Comprising anElevator-Door-Operating Mechanism of which the following is'aspecification.

My invention relates to devices for open- 0 ing and closing elevatordoors by means of a mechanism carried on the car, this mechanism beingused when the car arrives at any floor to operate the door at thatfloor.

To accomplish this result, it is necessary to Jrovide a projection. orprojections on the door or connected with the door which are engaged byoperating fingers carried on the car. Inasmuch as an elevator car doesnot move in exact alinement in its shaft, it is further necessary thatconsiderable clearance be allowed between the projections and thefingers as they come into operative relationship, and that thisclearance be taken up by closing the fingers in on the projection beforestarting to open the door, the fingers being opened again at the end ofthe closing movement of the door.

The principal object of my invention is to provide novel means forinsuring the opening and closing of these fingers to produce and destroythis clearance.

Referring to the drawings which are for illustrative purpose only, Fig.1 is a somewhat diagrammatic view of my invention with the parts in theposition they assume with the doors in their closed position and the carfree to move in the building structure.

Fig. 2 is a. similar view, the full lines showing the mechanism in theposition it assumes with the door fully open. Certain portions are alsoshown in dotted lines in the position they assume at the beginning ofthe opening and finish of the closing movement before the fingers startto open to establish clearance.

Fig. 3 is a side view of the mechanism shown in Fig. 2, and Fig. 4 is asection on plane represented by the line 44 of Fig. 2.

The apparatus illustrated in these drawings comprise a. frame 11 havinga cylinder 12 rigidly secured thereto, a piston 13 being fluid actuatedby any convenient means, not shown, and moving freely in the cylinder12. The piston 13 operates a head 14 which slides in the frame 11. Anyother convenient means of sliding the head 14 in the frame 11v may besubstituted for the cylinder and piston shown, such for example as motordriven devices of all kinds.

Mounted on the pins 20, carried on the head 14 is a closing finger 21and mounted on a pin 22 is an opening finger 23, these fingers beingnormally pulled together by a tension spring 24 into the position shownin Fig. 1. Limit plates 25 govern the distance these fingers can movetogether under the influence of the spring 24. Fingers 21 and 23 closedown upon projections and 31 sliding in a door operating and lockingplate 32, the projections 31 and 32 being attached or connected to thedoor not shown. finger 21 is connected through a walking beam With aplunger 41 and the finger 23 is provided with a crank 50, the plunger 41and the crank projecting from the head 14 in such a manner that theystrike against a closing plate just before the door is entirely closed.

The method of operation of my invent-ion is as follows:

The parts being in the position shown in Fig. 1, it will be noted thatfingers 21 and 23 are withdrawn to a point within the limit lines of theframe 11 and that they are held in this position due to the contact ofthe crank 50 and the plunger 41 with the plate 60 V 5 It will also benoted that the fingers 21 and 23 are widely separated thus giving agreat deal of clearance between these fingers and the projections 30 and31. When it is desired to operate the door, the head 14 is actuated bymeans of the cylinder 12, the head moving upwardly as viewed in thedrawings. During its initial movement, the head. 14 moves away from theplate 60 thus allowing the crank 50 and the plunger 41 to be forceddownwardly under the influence of the spring 24. As a result the fingers21 and 23 close together into the position shown in dotted lines in Fig.2. A further movement of the head 14 moves the projections 30 and 31 andvarious members not shown connected therewith which opens the door. The

The

fingers 21 and 23 maintain their close contact with the projections and31 until the door isnearly closed at which time the crank and theplunger 41 strike against the plate and the fingers are again opened.

I claim as my invention:

1. In an elevator door operating device; a frame; a head sliding in saidframe; a door operating finger projecting fromsaid head to engage aprojection on the door; mechanism for sliding said head in said frame;

and means for utilizing a portion of said frame to disengage said fingerfrom said projection at or near the end of the door closing cycle.

2. In an elevator door operating device; a frame;a head slidin in saidframe ;'a door operating finger pro ecting from said'hea'd to engage aprojection on the door; mechanism for sliding-saidhead in said frame; aspring holding said finger in its-engaged position; and means by whichaportionofsaid frame throws said finger out of its engaged position.

In a door operatin device; a frame; a head sliding in said game; fingersprojecting from said frame'to engage a projection on the door; a springfor holdin said fingers in their enga ed position; and means forutilizing a portion of said frame to throw said fingers out of theirengaged position.

4. In a door operating device; a frame; a head sliding in said frame;fingers projecting from said frame to engage a projection on the door; aspring for holding said fingers in their engaged position; and means bywhich a projection on said frame opens said fingers at one end of themovement of said head.

In testimony whereof, I have hereunto set my hand at Los Angeles,Californimthis 5th day of April, 1923.

FREDERCK F. BRUSH.

